Question: Lactic acid contains what monomer and is used to treat what medical condition?
Paraphrase: What monomer in the lactic acid which is used to treat what medical condition?
SPARQL (Wikidata): SELECT ?ans_1 ?ans_2 WHERE { wd:Q161249 wdt:P4599 ?ans_1 . wd:Q161249 wdt:P2175 ?ans_2 }
Answer: polylactic acid, dermatitis, polylactic acid, facial dermatosis